Development of a polarization resolved spectroscopic diagnostic for measurements of the vector magnetic field in the Caltech coaxial magnetized plasma jet experiment.
Development of a polarization resolved spectroscopic diagnostic for measurements of the vector magnetic field in the Caltech coaxial magnetized plasma jet experiment.
复制标题
开发偏振分辨光谱诊断仪，用于测量加州理工学院同轴磁化等离子体射流实验中的矢量磁场。
DOI：
10.1063/1.4793403
复制
发表时间：
2013
期刊：
影响因子：
--
通讯作者：
P. Bellan
中科院分区：
文献类型：
--
作者：
T. Shikama;P. Bellan
在加州理工学院的同轴磁化等离子体射流实验中，开展了有关球斑形成、天体物理射流形成/传播、太阳日冕物理以及拦截边界的扭曲磁通管的一般行为的基础研究。为了测量磁场矢量的空间分布，了解控制其动力学行为的潜在物理特性，采用无扰动可见发射光谱法观察发射光谱中的塞曼分裂。我们设计并构建了一个可以同时检测左右圆偏振发射的偏振分辨光学系统。该系统应用于单电离氮谱线。磁场强度的测量精度约为±13mt。磁场分量的方位和轴向分量的径向分布通过反演方法得到。
In the Caltech coaxial magnetized plasma jet experiment, fundamental studies are carried out relevant to spheromak formation, astrophysical jet formation/propagation, solar coronal physics, and the general behavior of twisted magnetic flux tubes that intercept a boundary. In order to measure the spatial profile of the magnetic field vector for understanding the underlying physics governing the dynamical behavior, a non-perturbing visible emission spectroscopic method is implemented to observe the Zeeman splitting in emission spectra. We have designed and constructed a polarization-resolving optical system that can simultaneously detect the left- and right-circularly polarized emission. The system is applied to singly ionized nitrogen spectral lines. The magnetic field strength is measured with a precision of about ±13 mT. The radial profiles of the azimuthal and axial vector magnetic field components are resolved by using an inversion method.